From 27e78a2a1f92e79707b4fb18cff1276088ef9178 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 18 Jun 2015 10:30:21 +0200 Subject: [PATCH] drm/i915: Filter out no-op frontbuffer tracking flushes Paulo noticed that the fbc frontbuffer tracking flush callback occasionally gets a call without any bit set. This can happen when we have to filter flush calls due to e.g. gpu rendering. Filter these out. Reported-by: Paulo Zanoni Cc: Paulo Zanoni Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_frontbuffer.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_frontbuffer.c b/drivers/gpu/drm/i915/intel_frontbuffer.c index 3b0ac73ede8f..6a70a51332e9 100644 --- a/drivers/gpu/drm/i915/intel_frontbuffer.c +++ b/drivers/gpu/drm/i915/intel_frontbuffer.c @@ -175,6 +175,9 @@ void intel_frontbuffer_flush(struct drm_device *dev, frontbuffer_bits &= ~dev_priv->fb_tracking.busy_bits; mutex_unlock(&dev_priv->fb_tracking.lock); + if (!frontbuffer_bits) + return; + intel_mark_fb_busy(dev, frontbuffer_bits); intel_edp_drrs_flush(dev, frontbuffer_bits); -- 2.39.2